我有一个Java Swing应用程序。书面的我想像使用JPanel statusPanel一样给它添加一个页脚。我知道这可以在BorderLayout中完成，但我希望在GroupLayout中完成。目前我正在使用以下内容：
JLabel lblNewLabel = new JLabel("New label");
lblNewLabel.setText("Status Bar");
下面是我的完整代码
import java.awt.Dimension;
import java.awt.EventQueue;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.border.EmptyBorder;
import org.NXI.CreateNxi_Main;
import javax.swing.UIManager;
import javax.swing.JButton;
import javax.swing.JFileChooser;
import java.awt.event.ActionListener;
import java.io.File;
import java.awt.event.ActionEvent;
import javax.swing.GroupLayout;
import javax.swing.GroupLayout.Alignment;
import javax.swing.JTextField;
import javax.swing.JTextArea;
import javax.swing.LayoutStyle.ComponentPlacement;
import javax.swing.JProgressBar;
@SuppressWarnings("serial")
public class DummyFrame extends JFrame {
private JPanel contentPane;
private JTextField srcTextField;
private JTextField destTextField;
private JButton btnNewButton;
/**
* Launch the application.
*/
public static void main(String[] args) {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (Throwable e) {
e.printStackTrace();
}
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
DummyFrame frame = new DummyFrame();
frame.setResizable(false);
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
/**
* Create the frame.
*/
public DummyFrame() {
setTitle("DummyFrame");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 604, 452);
contentPane = new JPanel();
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
setContentPane(contentPane);
JButton srcBtn = new JButton("Source Excel");
srcBtn.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
JFileChooser fChoose = new JFileChooser();
fChoose.showOpenDialog(null);
File f = fChoose.getSelectedFile();
srcTextField.setText(f.getAbsolutePath());
}
});
srcTextField = new JTextField();
srcTextField.setColumns(10);
destTextField = new JTextField();
destTextField.setColumns(10);
JButton destBtn = new JButton("Output Excel");
destBtn.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
JFileChooser fChoose = new JFileChooser();
fChoose.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
fChoose.setAcceptAllFileFilterUsed(false);
if (fChoose.showOpenDialog(null) == JFileChooser.APPROVE_OPTION) {
destTextField.setText(fChoose.getSelectedFile().getAbsolutePath() + "\");
System.out.println(fChoose.getCurrentDirectory());
} else {
System.out.println("No Selection");
}
}
});
final JProgressBar progressBar = new JProgressBar(0, 100);
progressBar.setValue(0);
progressBar.setStringPainted(true);
final JTextArea outputTextArea = new JTextArea();
outputTextArea.setEditable(false);
btnNewButton = new JButton("Convert");
btnNewButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
CreateNxi_Main createNxi_Main = new CreateNxi_Main();
try {
createNxi_Main.getInputAndOutputPaths(srcTextField.getText(), destTextField.getText() + "\",
outputTextArea, progressBar);
} catch (Exception e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
}
});
JScrollPane scrollPane = new JScrollPane(outputTextArea);
scrollPane.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
scrollPane.setPreferredSize(new Dimension(100, 100));
JLabel lblNewLabel = new JLabel("New label");
lblNewLabel.setText("Developed by 0138039");
GroupLayout gl_contentPane = new GroupLayout(contentPane);
gl_contentPane.setHorizontalGroup(gl_contentPane.createParallelGroup(Alignment.LEADING)
.addGroup(gl_contentPane.createSequentialGroup()
.addGroup(gl_contentPane.createParallelGroup(Alignment.LEADING)
.addGroup(gl_contentPane.createSequentialGroup().addContainerGap()
.addGroup(gl_contentPane.createParallelGroup(Alignment.LEADING)
.addComponent(destTextField, Alignment.TRAILING,
GroupLayout.DEFAULT_SIZE, 421, Short.MAX_VALUE)
.addComponent(srcTextField, GroupLayout.DEFAULT_SIZE, 421, Short.MAX_VALUE))
.addGap(122))
.addGroup(gl_contentPane.createSequentialGroup().addContainerGap()
.addGroup(gl_contentPane.createParallelGroup(Alignment.TRAILING)
.addComponent(lblNewLabel, Alignment.LEADING, GroupLayout.DEFAULT_SIZE, 543,
Short.MAX_VALUE)
.addComponent(scrollPane, Alignment.LEADING, GroupLayout.DEFAULT_SIZE, 543,
Short.MAX_VALUE)
.addGroup(gl_contentPane.createSequentialGroup()
.addPreferredGap(ComponentPlacement.RELATED, 446, Short.MAX_VALUE).addComponent(
destBtn, GroupLayout.PREFERRED_SIZE, 97, GroupLayout.PREFERRED_SIZE))
.addGroup(gl_contentPane.createSequentialGroup()
.addPreferredGap(ComponentPlacement.RELATED, 446, Short.MAX_VALUE).addComponent(
srcBtn, GroupLayout.PREFERRED_SIZE, 97, GroupLayout.PREFERRED_SIZE))))
.addGroup(gl_contentPane.createSequentialGroup().addGap(46)
.addComponent(progressBar, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE,
GroupLayout.PREFERRED_SIZE)
.addGap(36).addComponent(btnNewButton, GroupLayout.DEFAULT_SIZE, 107, Short.MAX_VALUE)
.addGap(218)))
.addGap(25)));
gl_contentPane.setVerticalGroup(gl_contentPane.createParallelGroup(Alignment.LEADING).addGroup(gl_contentPane
.createSequentialGroup().addGap(14)
.addGroup(gl_contentPane.createParallelGroup(Alignment.BASELINE)
.addGroup(gl_contentPane.createSequentialGroup().addGap(3).addComponent(srcTextField,
GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE))
.addComponent(srcBtn, GroupLayout.DEFAULT_SIZE, GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
.addGap(18)
.addGroup(gl_contentPane.createParallelGroup(Alignment.BASELINE, false)
.addComponent(destTextField, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE,
GroupLayout.PREFERRED_SIZE)
.addComponent(destBtn, GroupLayout.PREFERRED_SIZE, 20, GroupLayout.PREFERRED_SIZE))
.addGroup(gl_contentPane.createParallelGroup(Alignment.LEADING)
.addGroup(gl_contentPane.createSequentialGroup().addGap(18).addComponent(btnNewButton,
GroupLayout.PREFERRED_SIZE, 42, GroupLayout.PREFERRED_SIZE))
.addGroup(gl_contentPane.createSequentialGroup().addGap(31).addComponent(progressBar,
GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE)))
.addGap(18).addComponent(scrollPane, GroupLayout.DEFAULT_SIZE, 218, Short.MAX_VALUE)
.addPreferredGap(ComponentPlacement.UNRELATED)
.addComponent(lblNewLabel, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addGap(8)));
contentPane.setLayout(gl_contentPane);
}
}
我不想使用标签，而是使用StatusPanel。请让我知道我是否可以得到这个，如果可以，我该怎么做？
Swing中没有StatusPanel这样的东西。在任何布局中，状态行通常只是JFrame底部的一条窄线。比JLabel更令人兴奋的方法是通过扩展JPanel来滚动您自己的StatusPanel。这就是他们在Sabacc Online中的做法：
public class JStatusPanel extends JPanel {
protected JLabel message = new JLabel("Status");
public JStatusPanel() {
this.setLayout(new BorderLayout());
message.setAlignmentY(JLabel.CENTER_ALIGNMENT);
message.setAlignmentX(JLabel.CENTER_ALIGNMENT);
add(message, BorderLayout.CENTER);
}
public void showInfo(String text) {
message.setForeground(new Color(0, 0, 0));
message.setText(text);
}
public void showError(String text) {
message.setForeground(new Color(255, 0, 0));
message.setText(text);
}
}